Rocking grate for furnaces.



No. 644,365. Patehted vFeb. 27, I900. c; w. NASDN & c. YINGLING.

ROCKING GRATE FUR FURNACES.

(Application filed July 12, 1894.)

(Na Model.) 2 Sheets-Shaat l.

THE Nomus PETERS co. PHOTOJJTHO WASHINGYON. a c

No. 644,365. Patented Feb. 27, I900.

C. W NASUN &. C. YINGLING. ROCKING GBATE FOR FURNACES.

(Application filed July 12, :1B94.) (Na Model.) 2 Sheots-Sheet 2.

- tle within the rim, each presenting an open- OARLETON W. NASON, OF NEl/V YORK, N. Y., AND CHARLES YINGLING, OF METUCHEN, NEW JERSEY; SAID NASON ASSIGNOR TO SAID YINGLING.

FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 64.4,365, dated February 27, 1900.

Application filed July 12, 1894.

T0 at whom it may concern Be it known that we, OARLETON WV. NASON, of the city and county of New York, in the State of New York, and CHARLES YINGLING, of Metuchen, in the county of Middlesex and State of New Jersey, have invented a certain new and useful Improvement in Rocking Grates for Furnaces, of which the following is a specification.

Our improved grate may be used in furnaces generally. It is well adapted for furnaces of uprightsteam-boilers, and we will describe it as thus applied.

The accompanying drawings form part of this specification and represent what we consider to be the best means of carrying out the invention.

Figure 1 is a plan view of a furnace-base with a grate therein embodying our new im provements. Fig. 2 is a vertical section of the same, partly in elevation; and Figs. 3 and at are views, on a larger scale, of the grate detached, Fig. 3 being a plan and Fig. 4 a ver tical section on line at 4 of Fig. 3.

' Similar letters of reference indicate corre-' sponding parts in all the figures where they appear.

Referring to the figures, A is the cast-iron base of a furnace for a steam-boiler, which boiler (not shown) maybe an ordinary upright boiler or may be of any other form requiring a circular grate.

B is a shaft supported in hearings in the base A.

D is a circular rim turning on the shaft B. It is supported in a horizontal position on one side by a fixed stop A, cast on the base. The other side is supported by a movable stop 0 in the form of a sliding bolt; On drawing out this bolt the rim D may be tilted by any sufficient force and thrown into the inclined position shown in dotted lines in Fig. 2.

The rim D is cast with eight pockets d a littopped slot adapted to receive a pivot of a section of grate and to form an open-top bearing for said pivot.

The central shaft B engages in holes in the base A and extends a squared end outward to receive a suitable lever (not shown) by which the grate-sections can be rocked, while Serial No. M71284; N0 model.

the rim is stiifly held in the level position by the bolt 0, or may be tilted by a further movement in the proper direction when the bolt 0 is pulled out. The rim engages on this shaft by slots cl, opening downward.

The central section of the grate is formed by short fingers B, cast on the central shaft B and having their plane top sufficiently far above the axis of turning (to wit, the axis of the shaft B) to give horizontal as well as Vertical movements to said tops when the shaft B is rocked. This shaftis also provided with segments of gears B 13 (See Figs. 3 and 4.) E and F are shafts of less length and of a little less diameter supported by their extreme ends in open-top bearin gs in the pockets cl which are nearest the center. G and H are still shorter shafts supported in open-top bearingsin the pockets d which are farthest from the center. Each of these four shafts is provided with short fingers E F G H, respectively, and the plane tops of these fingers are sufficiently far above their corresponding axes of turning to give horizontal as well as vertical movements 7 5 thereto when the grate-sections formed by said fingers and their shafts are rocked. To impart this rocking motion, the shafts E F have each a tooth E F ,respectively,which engages one of the gear-segments B on the shaft B to receive motion, and a gear-segment E F respectively, which is engaged by a tooth G H respectively, on the shafts G and H. These teeth and gear-segments are formed integral with the corresponding shafts and underlie the fingers on such shaft. When, therefore, the grate-section B B is rocked, the motion is imparted by the gear-segments and teeth to the parallel sections E E, F F, G G, and H H, the adjacent sections being 0 rocked in opposite directions. The fingers on adjacent sections are interleaved, (see Figs. 1 and 3,) and when the sections are rocked the so interleaved fingers rise and fall together; but their lateral motion is in opposite directions. As the tops of the sections are plane, (fiat, in other words,) the fuel is lifted at each rise of the interleaved fingers, while at the same time, owing to the lateral motion of the fingers in opposite directions, the fuel is torn apart with a shearing action which is well adapted to reduce any cinders to powder.

Should a cinder or coal be caught by the end of a finger as it descends, the open-top bearings of the corresponding shaft allow the grate-section to rise, so that the coal or cinder may pass downward.

At the edge of the gate the rim D may have short fingers D thereon projecting inward and alternating with the fingers G H, respectively, on the outer side of the shafts G H.

Modifications may be made Without departing from the principle or sacrificing the advantages of the invention. WVe have shown (see Fig. 3) the central shaft B as geared to the immediately-adjacent shafts E and F on each side at two points, and each shaft E F is geared to the adjacent shaft Gor H at only one point. Such arrangement is preferable, because the strain to be comm unicated from the shaft 13 to each shaft E and E is obviously greater than that from the shaft E or F to the corresponding shaft G or H; but there may be two or more segments gearing each of the shafts to the next, or one alone may serve at each place.

We claim as our invention- 1. In a grate, rotatory parallel sections having substantially-plane tops sufficiently far above the axes of turning to give horizontal as well as vertical movements to said tops and interleaved fingers B E F as shown, in combination with means for rocking the adjacent sections in opposite directions so that the interleaved fingers move up and down together but laterally in opposite directions, substantially as described.

2. In a grate, a supporting-frame having open top bearings, in combination two or more parallel sections mounted on axes supported in such bearings with provisions for rocking said sections, the said sections having substantially-plane tops adapted to serve as fuel-supporting surfaces and arranged so far above the axes that the motion induced by rocking shall not only tiltthe sections but also move the tops horizontally, and a section being allowed to rise when a cinder or coal is caught by the end of a finger and thus permit, when required, the passage downward of such masses, substantially as described.

In testimony that we claim the invention above set forth we affix our signatures in the presence of two witnesses.

CARLETON \V. NASON. C. YINGLlNG.

Witnesses:

II. A. JOHNSTONE, M. F. BOYLE. 

